Link the programs to create a DLL as follows:
LINK /dll /out:ISASMPL1.dll ISAMAIN.obj ISAINIT.obj ISATERM.obj C:\COBOL\F3BICBDM.obj F3BISAPI.lib F3BICIMP.lib kernel32.lib MSVCRT.lib /ENTRY:COBDMAIN /def:ISASMPL1.def